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authorBartosz Golaszewski <bgolaszewski@baylibre.com>2020-05-23 16:27:09 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-24 02:56:17 +0300
commitf75063abc39441585a13fcc5b9ef3af993e9ac40 (patch)
tree4159a8ce4a8e566442ee3a764d08661aa087ff21 /net/devres.c
parentcb8a14b205699fee1053a406e1e3fce330b6bdc3 (diff)
downloadlinux-f75063abc39441585a13fcc5b9ef3af993e9ac40.tar.xz
net: devres: define a separate devres structure for devm_alloc_etherdev()
Not using a proxy structure to store struct net_device doesn't save anything in terms of compiled code size or memory usage but significantly decreases the readability of the code with all the pointer casting. Define struct net_device_devres and use it in devm_alloc_etherdev_mqs(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/devres.c')
-rw-r--r--net/devres.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/net/devres.c b/net/devres.c
index c1465d9f9019..b97b0c5a8216 100644
--- a/net/devres.c
+++ b/net/devres.c
@@ -7,30 +7,34 @@
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
-static void devm_free_netdev(struct device *dev, void *res)
+struct net_device_devres {
+ struct net_device *ndev;
+};
+
+static void devm_free_netdev(struct device *dev, void *this)
{
- free_netdev(*(struct net_device **)res);
+ struct net_device_devres *res = this;
+
+ free_netdev(res->ndev);
}
struct net_device *devm_alloc_etherdev_mqs(struct device *dev, int sizeof_priv,
unsigned int txqs, unsigned int rxqs)
{
- struct net_device **dr;
- struct net_device *netdev;
+ struct net_device_devres *dr;
dr = devres_alloc(devm_free_netdev, sizeof(*dr), GFP_KERNEL);
if (!dr)
return NULL;
- netdev = alloc_etherdev_mqs(sizeof_priv, txqs, rxqs);
- if (!netdev) {
+ dr->ndev = alloc_etherdev_mqs(sizeof_priv, txqs, rxqs);
+ if (!dr->ndev) {
devres_free(dr);
return NULL;
}
- *dr = netdev;
devres_add(dev, dr);
- return netdev;
+ return dr->ndev;
}
EXPORT_SYMBOL(devm_alloc_etherdev_mqs);